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Interior Paint Problem Solving

When it comes to painting many of us like to think we can save a dollar or two by doing the job ourselves. Sure, but even the most professional painters can run into problems. The good news is that most issues can be fixed! We have curated a number of common challenges faced when it comes to interior painting. Thanks to the Dulux team here are some easy solutions and know-how on how to prevent them from happening in the first place.

 


1. Mould affected areas

If you’ve noticed black, grey or brown areas on your painted surface, chances are you’re dealing with a mould problem. As with mould anywhere, interior mould is caused by moisture. It’s often found on areas that are damp, receive little natural light and are poorly ventilated (bathrooms, kitchens and laundries). Mould is more likely to occur after use of a lower quality paint, failure to prime bare wood before painting, or if you’ve painted over a layer of mould without removing it.

 

SOLUTION: First, test for mould by applying a few drops of household bleach to the discoloured area. If it disappears, it is probably mildew. Remove it by scrubbing with a diluted household bleach solution (one-part bleach, three parts water). Be sure to wear rubber gloves and eye protection (even consider wearing a mask to cover your mouth). Then, rinse thoroughly, allow to dry, prime and apply one or two coats of top quality paint like Dulux Wash&Wear® Plus+ Kitchen and Bathroom. Where possible, install an exhaust fan to help prevent re-growth.

 


2. When droplets appear on acrylic paint

Have you noticed small droplets appearing on your fresh coat of acrylic paint? This is known as ‘surfactant leaching’. Don’t panic – it’s a normal part of the curing process.  Sometimes when acrylic paints are drying small, light coloured droplets will appear on the surface. This usually happens if newly painted surfaces are exposed to moisture, either by dew, high humidity or other types of moisture such as steam.

 

SOLUTION: These droplets cause no downgrading of the paint film’s durability, they only affect the appearance. Once the paint is dry, wash the surface with Selleys® Original Sugar Soap, and then rinse with plenty of water. Sometimes droplets may continue to appear for some time and will need wiping down until they stop. These droplets are simply surfactants, which are drawn to the surface by moisture.

 

 

 


3. Yellowing

Yellowing is the development of a yellow cast in aging solvent-based enamels. It’s most noticeable in the dried films of white paints or 

clear varnishes. Yellowing can be caused by the oxidation of alkyd or oil-based paint or varnish, heat from household items like stoves and heaters, or a lack of light to the area. It is also caused by exposure to ammonia from adjacent acrylic paint application in the same room; ammonia can oxidise the alkyd component in the oil-based enamel and cause premature yellowing.

SOLUTION: Where possible, choose a top-quality water-based paint and/or a non-yellowing varnish, we recommend Dulux Aquanamel®.Acrylic paints do not tend to yellow as much as solvent-based paints and are the only sure way to protect against premature yellowing.

 


4. Wrinkling

Wrinkling in paintwork can be identified by a rough, crinkled paint surface, which occurs when uncured paint forms a ‘skin’. It can be caused by any of the following:

• Applying paint too thickly (this is more likely when using alkyd or oil-based paints)
• Painting during extremely hot weather or cool damp weather, which causes the paint film to dry faster on top than underneath
• Exposing uncured paint to high humidity levels
• Applying a top coat of paint to the insufficiently cured primer
• Painting over a surface contaminated with dirt, dust or wax

 

 

SOLUTION: First, scrape or sand the substrate to remove wrinkled coating. If using a primer, allow it to dry completely before applying a topcoat. Then, repaint your surface in ideal conditions, applying an even coat of top quality interior paint.

 

 

 


5. Roller Splattering

Roller spattering is the tendency of a roller to throw off small droplets of paint during application. Generally, it’s caused by incorrect roller technique and applying the paint too rapidly. Using low-quality paint and/or roller as well as incorrect roller covers can also cause spattering.

 

 

SOLUTION: Always choose high-quality paint. They are formulated to minimise spattering. The right paint should be paired with the rightroller too – choose a high-quality roller, with the appropriate nap length. When painting, be careful not to overload the roller with paint as this will result in excess spatter. Working in three-feet square sections, apply the paint in a zigzag ‘M’ or ‘W’ pattern, and then fill in the pattern – this will also reduce the likelihood of spattering, giving you smooth, consistent paintwork.

 

 


6. Picture Framing

Picture framing occurs when a wall is painted with a roller but is brushed at the edges and corners. The brushed areas generally appear darker, resembling the frame of a picture. Also, sprayed areas may be darker than neighbouring sections that are brushed or rolled. Picture framing from brushing usually occurs because brushes result in a lower spread rate than rollers, which produces a thicker layer of paint. It can also occur if colourant is added to non-tintable paint, or if the wrong type or level of colourant is used.

 

 

SOLUTION: Picture framing can be minimised by ensuring adequate coverage is achieved across the entire wall and by maintaining a wet edge when rolling over brushed areas. Work in smaller sections of the room to maintain a ‘wet edge’ and ensure spread rates between brushes and rollers and similar. With tinted paints, be sure the correct colourant-base combinations are used. Factory colours, as well as in-store tints, should be thoroughly shaken at time of sale, and the paint should be stirred well prior to use.

 

 


 

Remember when it comes to painting, there are plenty more tips and advice available at www.dulux.com.au or you can contact their Customer Service Team on 132 525.

 

 

 

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